1191b0a44b
and XMITS has to be basically done in the same manner as for the Sabres, i.e. only for devices behind PCI-PCI-bridges and after a PIO read on the far side of the farest PCI-PCI-bridge. Given that the Tomatillo documentation mentions no difference to the Schizo bridges in this regard and this is also still part of the procedure described Schizo documentation this seems about right so adjust accordingly (the unconditional CDMA flushing/syncing previously done was based on how Linux behaves). - Implement CDMA flushing/syncing for Schizo version >= 5, which requires the workaround described in Schizo Errata I-23. According to Schizo Errata I-13 it's just unusable with version < 5 though. [1] - Don't register the Schizo streaming buffer for now until it's usage is sorted out according to the erratas. - Register our interrupt filters with the revived INTR_FAST so they these interrupts can even interrupt filters of device drivers as necessary. - Remove the comment regarding lack of newbus'ified bus_dma(9) as being able to associate a DMA tag with a device would allow to implement CDMA flushing/syncing in bus_dmamap_sync(9) but that would totally kill performance. Given that for devices not behind a PCI-PCI bridge the host-to-PCI bridges also only do CDMA flushing/syncing based on interrupts there's no additional disadvantage for polling(4) callbacks in the case schizo(4) has to do the CDMA flushing/syncing but rather a general problem. Reported by: Michael Moll [1]
81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
/*-
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* Copyright (c) 2005 by Marius Strobl <marius@FreeBSD.org>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification, immediately at the beginning of the file.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SPARC64_PCI_SCHIZOVAR_H_
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#define _SPARC64_PCI_SCHIZOVAR_H_
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struct schizo_softc {
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device_t sc_dev;
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struct mtx *sc_mtx;
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phandle_t sc_node;
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u_int sc_mode;
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#define SCHIZO_MODE_SCZ 0
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#define SCHIZO_MODE_TOM 1
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#define SCHIZO_MODE_XMS 2
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u_int sc_flags;
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#define SCHIZO_FLAGS_BSWAR (1 << 0)
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#define SCHIZO_FLAGS_CDMA (1 << 1)
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bus_addr_t sc_cdma_clr;
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uint32_t sc_cdma_state;
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#define SCHIZO_CDMA_STATE_DONE (1 << 0)
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#define SCHIZO_CDMA_STATE_PENDING (1 << 1)
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u_int sc_half;
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uint32_t sc_ign;
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uint32_t sc_ver;
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struct resource *sc_mem_res[TOM_NREG];
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struct resource *sc_irq_res[STX_NINTR];
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void *sc_ihand[STX_NINTR];
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struct iommu_state sc_is;
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struct rman sc_pci_mem_rman;
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struct rman sc_pci_io_rman;
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bus_space_handle_t sc_pci_bh[STX_NRANGE];
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bus_space_tag_t sc_pci_cfgt;
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bus_space_tag_t sc_pci_iot;
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bus_space_tag_t sc_pci_memt;
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bus_dma_tag_t sc_pci_dmat;
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uint8_t sc_pci_secbus;
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struct ofw_bus_iinfo sc_pci_iinfo;
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SLIST_ENTRY(schizo_softc) sc_link;
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};
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#endif /* !_SPARC64_PCI_SCHIZOVAR_H_ */
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